We will be upgrading out primary SQL clusters to the latest update of SQL 2014 CTP2 in order to correct an issue with the plan cache clearing on replica servers in an Availability Group.
This upgrade will happen tonight starting around 9pm EST (02:00 UTC). Both of our primary SQL clusters will be upgraded, meaning that all sites in the network should experience approximately a 5-10 second interruption in service as their cluster is upgraded. Follow our StackStatus twitter for updates as we perform the upgrade.